This is another �spare part� from a Leitz (Leica) Ergoplan semiconductor microscope. This module plugs into the left front of the microscope base. It is used to set the upper travel limit opto for the Z-axis (focus) drive of the microscope. The module consists of the external dress plate, the adjustment knob, the reck-and-pinion drive that carries the opto sensor, and the wiring harness which also includes a second bracket with a pair of limit switches..

The knob on the assembly is spring-loaded. In order to engage the pinion, the knob must be pressed inwards. Once the upper travel limit has been established (wafer chucks can be of widely differing heights) then the cover is secured to the knob to prevent accidental movement. Not only does the cover prevent the knob from being pressed inwards to engage the internal clutch, but there is a small cut-out in the knob which is meant to fit over the head of the Allen cap screw in the corner of the dress-plate. This prevents the cover from turning. This is a very useful spare part for Ergoplan users.

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***MPN
***OEM Leitz
***SKU*** DP440

Leitz (marked �Leitz Wetzlar Germany�) microscope objective for metallurgical instruments, of Plan Apochromatic correction. �Plan� objectives are corrected to display a perfectly flat image of up to 28mm in diameter, while Apochromat objectives are the most highly color corrected objectives available.

Magnification: 150x
Numerical Aperture: 0.90
Infinity corrected
Thread size 32mm
Must be used WITHOUT cover glass
Built-in annular condenser for dark field illumination
Red engraving denotes strain-free condition of optics (suitable for polarized light techniques, including interference contrast)
Working Distance:
Leica catalog number: 567 043

The large thread size accommodates the darkfield illumination annular optics. This objective will only work on the more recent Leitz (and Leica Microsystems) microscopes that have 32mm diameter thread positions on the nosepiece. These include the DMR series instruments, the DM4000 through DM6000 instruments, as well as the earlier Leitz Ergoplan microscope.

The objective is in near-perfect condition, and the glass is flawless.

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***MPN 567 043
***OEM Leitz
***SKU*** DP439

This is a polarizer slider for the Leitz (Leica) Ergoplan semiconductor microscope � it may fit other instruments as well. The Leitz part number is 573 097. The dimensions of the slider are 120mm in length, 28.5mm wide, and 11.5mm deep. There is a small bevel on the upper forward edge of the slide to prevent accidental insertion of the slide in the inverted position.

The slider consists of three elements. The first is the actual polarizing filter. Then there is a plate inserted in a cutout that appears to be a quarter-wave plate that is oriented so the permitted vibration directions are parallel to the analyzer and polarizer � in other words, no light is passed in that position. Then there is a third element opposite the polarizer. Behavior of the slider was similar whether it was upright or inverted � when an analyzer was placed in front of the slider and brought to the extinction position (no light transmission) and the slide was inverted, there continued to be zero transmission. The central plate also has a pair of set screws so it can be critically set.

I have been unable to figure out the function of these additional two plates. There was an earlier version of the Leitz reflected light interference contrast in which the polarizer could be rotated behind a fixed quarter-wave plate � this permitted a variation in the contrast without having to move the Wollaston prisms with respect to the optic axis, instead the polarizer is rotated behind the fixed quarter-wave plate. However, in the Ergoplan, the polarizer is fixed and the Wollastons are adjustable.

The slider is in near-perfect cosmetic condition, and the optical elements are in perfect condition.

BMI Surplus, Inc. is your best resource for new, pre-owned & refurbished microscopes and microscope components. We will work with you individually to find the perfect microscope for your application..

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**Shipping & Freight fees are dependent on your location. We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier. We have 30 years of shipping sensitive scientific & industrial equipment. We ship with the utmost care!
***MPN 573 097
***OEM Leitz
***SKU*** DP430

This is another fiber optic ringlight without any manufacturer�s marking, however it is very well made. Even the clamping screw is stainless steel set into a special stainless nut. The bundle is 32 inches long, and the input ferrule is a non-standard size (0.561 inch diameter and 0.500 inches long). The bundle is armored but does not have vinyl cladding.

The ringlight has an outer diameter of 3.325 inches and is 1.193 inches tall. The larger interior diameter is 2.289 inches, stepping down to 2.000 inches. There are three 10-32 tapped holes located near the base of the ringlight (one opposite the input ferrule, the other two at 90 degrees). I am not sure if they were meant for an accessory or if they were meant for another means of mounting, but they are blind holes about 3/8 inch deep.

The ringlight is in near-perfect condition � there are no fiber drop-outs, and everything is very clean.

Location MB 95

Photo set 755
***MPN
***OEM Custom
***SKU*** DP323

This is a Fostec fiber optic ringlight illuminator. The bundle length is 30 inches (ferrule to ferrule), and the bundle is armored and vinyl clad. The input ferrule is stepped � the smaller and shorter diameter is 0.625 inches and 0.240 inches long. The larger diameter is 0.715 inches with a length of 0.475 inches. Largest diameter of the ferrule is 0.868 inches.

The ringlight has an outside diameter of 3.485 inches. The overall height of the ringlight is 1.066 inches. The larger internal diameter is 2.600 inches, with a step down to 2.370 inches. There is a small groove on the light exit side of the ring onto which may be placed a rotating polarizer foil (not included). The ringlight does not have any means of directly fastening to the microscope (no set screws).

In order to fasten to the microscope another ring is attached to three threaded holes on the top of the ringlight. This attachment ring is missing from this particular ringlight..

These ringlights are in superb condition.

Location MB 95

Photo set 754

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recycled & refurbished Microscopes, Microscope Parts &
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for your application.
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sensitive scientific instruments & industrial equipment. We ship
with the utmost care!

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***MPN
***OEM Fostec
***SKU*** DP322

This is a nicely made (but no manufacturer�s mark) bifurcated fiber optic gooseneck. The anodizing on the ferrules has faded making them a bit unattractive, but they are very well-behaved � they stay where they are put. There does not seem to be any fiber drop-out either � and the bundle ends are well-finished.

The dimensions on these bundles are definitely Metric. The bundle length is 500mm, and the input ferrule has a stepped sleeve. The smaller diameter is 13mm by 16mm in length, with a step up to 20mm diameter, 15mm in length. The 20mm sleeve has a flat milled on one side, and on the opposite side is a hole in the facing flange, probably to engage a pin on the fiber optic illuminator (to prevent the bundle from tipping to one side in the port).

The output ferrule is 9mm in diameter, and 11mm long. The output diameter of the bundle is about 6mm.

These are in very nice condition if you have the correct illuminator with which to use them.

Location MB 94

Photo set 742
***MPN
***OEM Generic
***SKU*** DP310

I would honestly be a bit generous in calling these �budget� bifurcated gooseneck fiber optic bundles. They will get light from one end of the bundle to the other, but the bundles typically will experience fall-out in one or both sides, although the highest percentage I have seen probably doesn�t approach 40. The other problem is that the goosenecks often do not stay where they are set. Sometimes there are flaws in the coils that cause the bundle to bend at an angle that cannot be straightened. And lastly, the bundles at the tips of the ferrules are often not flush with the ends.

In dimension, they were made to be compatible with the Dolan Jenner bifurcated bundles (.625 x .500 inch long input ferrule, and .500 x 1.475 inch long output ferrule), complete with the flat milled on the top of the input ferrule. The good thing about these is that they are very inexpensive � they WILL get light from one end to the other (although not 100%), and if you have a means of securing the output end where you want it, they represent a huge savings over the Dolan Jenner bundles

Location MB 92

Photo set 740
***MPN
***OEM Generic
***SKU*** DP308

This is a Dionics, Inc. bifurcated fiber optic bundle for illumination purposes. Each arm of the bundle is 16 inches long. The output ferrule tapers down so the extremity is only 0.187 inches in diameter (3/16 inch). The length of the small diameter is .665 inches. Actual fiber bundle diameter at the tip is 0.125 inches.

The input bundle diameter is 0.175 inches. The diameter of the ferrule for the illuminator end is 0.625 inches, and 0.500 inches in length. There is a small flat milled on either side of the input ferrule for secure clamping.

These are exceptionally well made bundles � they stay put once they are positioned, and the quality of the construction is evident everywhere. There is no fiber �drop-out� in any of the bundles.

Location MB 91

Photo set 737
***MPN
***OEM Dionics, Inc.
***SKU*** DP305